ABB REL670 2.2 IEC Applications Manual page 524

Section 9
Current protection
518
Operate
IEC06000441 V1 EN-US
Figure 281: Underpower mode
The setting Power1(2) gives the power component pick up value in the Angle1(2)
direction. The setting is given in p.u. of the generator rated power, see
equation 494.
Minimum recommended setting is 0.2% of S
the IED are used.
= × ×
S 3 UBase IBase
N
EQUATION1708 V1 EN-US
The setting Angle1(2) gives the characteristic angle giving maximum sensitivity of
the power protection function. The setting is given in degrees. For active power the
set angle should be 0° or 180°. 0° should be used for generator low forward active
power protection.
Q
Power1(2)
Angle1(2)
when metering class CT inputs into
N
1MRK 506 369-UEN B
P
en06000441.vsd
(Equation 494)
Line distance protection REL670 2.2 IEC
Application manual